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arXiv · 1910.06114

Purcell-Enhanced Emission from Individual SiV$^-$ Center in Nanodiamonds Coupled to a Si$_3$N$_4$-Based, Photonic Crystal Cavity

Konstantin G. Fehler·Anna P. Ovvyan·Lukas Antoniuk·Niklas Lettner·Nico Gruhler·Valery A. Davydov·Viatcheslav N. Agafonov·Wolfram H. P. Pernice·Alexander Kubanek
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Abstract

Hybrid quantum photonics combines classical photonics with quantum emitters in a postprocessing step. It facilitates to link ideal quantum light sources to optimized photonic platforms. Optical cavities enable to harness the Purcell-effect boosting the device efficiency. Here, we postprocess a free-standing, crossed-waveguide photonic crystal cavity based on Si$_3$N$_4$ with SiV$^-$ center in nanodiamonds. We develop a routine that holds the capability to optimize all degrees of freedom of the evanescent coupling term utilizing AFM nanomanipulation. After a few optimization cycles we resolve the fine-structure of individual SiV$^-$ centers and achieve a Purcell enhancement of more than 4 on individual optical transitions, meaning that four out of five spontaneously emitted photons are channeled into the photonic device. Our work opens up new avenues to construct efficient quantum photonic devices.

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Konstantin G. Fehler, Anna P. Ovvyan, Lukas Antoniuk, Niklas Lettner, Nico Gruhler, Valery A. Davydov, Viatcheslav N. Agafonov, Wolfram H. P. Pernice, Alexander Kubanek. 2019-10-14. Purcell-Enhanced Emission from Individual SiV$^-$ Center in Nanodiamonds Coupled to a Si$_3$N$_4$-Based, Photonic Crystal Cavity. https://doi.org/10.1515/nanoph-2020-0257

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